Can You Vacuum Seal Onions?

Have you ever wondered if you can vacuum seal onions? I have, and I have to admit, that it seems like a lot of work. But the truth is that there is a way to vacuum seal onions.

Can you vacuum seal onions?

Yes, you can vacuum seal onions. This is a great way to preserve them for later use. Vacuum sealing onions will keep them fresh for up to 8 weeks. When you vacuum seals an onion, you keep its natural flavor. It also cuts down on food waste, which is excellent for your budget and the environment.

Onions, like garlic, are highly perishable. They don’t last very long, so they need to be vacuum-sealed, or else they’ll turn into that slimy, mushy mess that’s hard to digest. However, onions and garlic can be stored safely in the refrigerator for several weeks. This is a great way to preserve fresh vegetables. You should never leave them out in the sun because this will cause them to spoil quickly.

In this guide, we’ll explain about can you vacuum seal onions, how to do that, the pros and cons, and some care tips, so keep reading.

Can You Vacuum Seal Onions

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Is It Safe to Use Vacuum-sealed Onions?

Vacuum-sealed onions are safe to use and will not spoil as quickly as an onion that has not been vacuum-sealed. There is no evidence to suggest that using vacuum-sealed onions has any adverse effect on health. In fact, many people believe that vacuum-sealing onions help to preserve their freshness and flavor.

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How Do You Vacuum Seal Onions?

Here are the steps that you can follow to properly vacuum-seal your onions:

  • Peel the onion and cut off the root end. Cut the onion in half from the root end to the top. Slice the onion in half again and then slice it into thin strips.
  • Place the onion strips into a vacuum seal bag.
  • Seal the bag using a good-quality vacuum sealer.
  • Place the sealed bag into the refrigerator.
  • When ready to use, remove the bag from the refrigerator and cook the onions as desired.

Can You Vacuum Seal Cooked Onions?

Yes, you can vacuum seal cooked onions. Cooked onions can last up to 2 weeks when vacuum sealed and stored in the refrigerator. 

After cooking onions, you should cool down the onions and put them in a sealed plastic bag. Place the bag in a cold freezer and freeze them overnight. Once frozen, you can remove the onions from the bag and use them as desired. If you don’t have time to do this, you can still use the onion, but the flavor will differ.

Pros and Cons of Vacuum Sealing Onions

There are many advantages of vacuum sealing onions.


  • Vacuum sealing onions is a great way to preserve them.
  • Onions will remain fresh and prevent spoilage.
  • It also keeps them from getting freezer burn.
  • One of the benefits of vacuum sealing onions is that they will last longer.
  • Vacuum sealing will protect them from moisture and other elements that can lead to spoilage.
  • Additionally, it can help keep their flavor and texture consistent.


There are a few potential drawbacks to vacuum sealing onions.

  • First, if the seal isn’t perfect, gas will escape, and the onion will eventually spoil.
  • Second, vacuum sealing can create heat which can damage the onion.
  • Finally, gas will escape if the vacuum seal is broken, and the onion may spoil.

How to Store Vacuum Sealed Onions?

The best way to store vacuum-sealed onions is in a cool, dry place.

Place the onions in a vacuum sealer bag and seal it according to the manufacturer’s instructions. Once the bag is sealed, store it in a moisture-free environment, in a freezer. This will prevent them from losing their flavor or becoming spoiled.

They can also be stored in the refrigerator to keep them cold. However, refrigeration can cause it to become mushy. Freezing is a good option for storing vacuum-sealed onions, and they can be frozen for long periods and will still remain fresh and edible.


Vacuum sealing onions can help protect them from spoilage and make them last longer. Additionally, vacuum sealing allows you to store them in a more convenient location, preventing them from becoming clumped together and making them difficult to access. If you’re interested in trying this technique, follow the instructions provided below.

I hope you found my blog helpful; check out our guides about vacuum sealing the other vegetables. 

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